Salvo wrote:
For us 12V guys, peak efficiency is at 70W. Regardless of battery system, peak efficiency is located at the low end of the charging current range, between 5 and 10A.
Peak efficiency for most regulators (with the exception of some multi-phase designs) is normally at the lower end of the range. That's because resistive losses increase with the square of the current. Double the current (to 10a) and you're still at almost 97%, double it again (20a) at you're at 95.6%. Worst-case (30a) you're still at about 94%. You make it seem as though anything other than the sweet spot is going to be terrible -- which, in reality, is not true at all.